[Event "Interzonal-08"]
[Site "Palma de Mallorca"]
[Date "1970.11.09"]
[Round "1"]
[White "Geller, Efim P"]
[Black "Portisch, Lajos"]
[Result "1/2-1/2"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Nb8 10. d4 Nbd7 11. c4 c6 12. cxb5 axb5 13. Nc3 Bb7 14. Bg5 b4 15. Nb1 Ne8 16. Bxe7 Qxe7 17. Nbd2 Nc7 18. Nc4 Nb5 19. Rc1 Rfd8 20. Ne3 c5 21. dxc5 1/2-1/2